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Ivan
Asked:2020-05-08 02:15:09 +0000 UTC2020-05-08 02:15:09 +0000 UTC

无法将文件写入外部存储

  • 772

我正在尝试将图片写入手机的外部存储器（外部存储），但未创建文件夹和文件本身。在一台设备上一切正常，但在另一台设备上却没有，写入访问被拒绝。它可以在其上运行，有一个版本的 sdk 25，另一个版本是 29。

java.io.FileNotFoundException：/storage/emulated/0/1588875980977.jpg：打开失败：EACCES（权限被拒绝）

private fun checkPermission() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, android.Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, arrayOf(android.Manifest.permission.WRITE_EXTERNAL_STORAGE, android.Manifest.permission.READ_EXTERNAL_STORAGE), 100)
        }
    }
}

override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
    if (requestCode == 100) {
        if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
            settings.edit().putBoolean("save", true).apply()
        } else {
            settings.edit().putBoolean("save", false).apply()
        }
    }
}

private fun getImageUriFromBitmap(bitmap: Bitmap?): Uri{
    val path = Environment.getExternalStorageDirectory().toString()
    val file = File(path,System.currentTimeMillis().toString() + ".jpg")
    val output = FileOutputStream(file)
    bitmap!!.compress(Bitmap.CompressFormat.JPEG, 100, output)
    output.flush()
    output.close()
    return Uri.fromFile(file)
}
android

1 个回答

  1. Best Answer

    我通过在清单中添加一行解决了这个问题

    android:requestLegacyExternalStorage="true"

<application
    android:allowBackup="true"
    android:requestLegacyExternalStorage="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    • 0

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